Isaac Watts on Worship

The Great God values not the service of men if the heart be not in it: the Lord sees and judges the heart; he has no regard for outward forms of worship, if there be no inward adoration, if no devout affection be employed therein. It is therefore a matter of infinite importance, to have the whole heart engaged steadfastly for God.

~ Isaac Watts (1674-1748),
Discourses on the Love of God